package com.itheima.edu.info.manger.controller;


import com.itheima.edu.info.manger.domain.Student;
import com.itheima.edu.info.manger.service.StudentService;

import java.util.Scanner;

public class StudentController {
    private Scanner sc=new Scanner(System.in);
    public void start() {
        while (true){
        System.out.println("--------欢迎来到 <学生> 管理系统--------");
        System.out.println("请输入您的选择: 1.添加学生  2.删除学生  3.修改学生  4.查看学生  5.退出");
        String choice=sc.next();
        switch (choice) {
            case "1":
                addStudent();
                break;
            case "2":
                //System.out.println("删除");
                deleteStudentById();
                break;
            case "3":
                //System.out.println("修改");
                updateStudentById();
                break;
            case "4":
//                System.out.println("查询");
                findAllStudent();
                break;
            case "5":
                System.out.println("感谢使用学生信息管理系统！");
                return;
            default:
                System.out.println("你的输入有误，请重新输入！");
        }
        }
    }
//修改学生信息
    public void updateStudentById() {
        String uid=getId();
        Student newStu = setStuInfo(uid);
        StudentService.updateStudentById(uid,newStu);
        System.out.println("修改成功！");

    }
//删除学生信息
    public void deleteStudentById() {
        String did=getId();
        StudentService.deleteStudentById(did);
        System.out.println("删除成功！");
    }
//获取所有学生信息
    public void findAllStudent() {
        Student[] students=StudentService.findAllStudent();
        if (students==null){
            System.out.println("查询无数据，请添加后重试");
            return;
        }
        System.out.println("学号\t\t姓名\t年龄\t生日");
        for (int i = 0; i < students.length; i++) {
            Student stu=students[i];
            if (stu!=null){
                System.out.println(stu.getId()+"\t"+stu.getName()+"\t"+stu.getAge()+"\t\t"+stu.getBirthday());
            }
        }
    }
//添加学生信息
    public void addStudent() {
        String id;
        while (true) {
            System.out.println("请输入学生学号：");
            id = sc.next();
            boolean flag = StudentService.isExists(id);
            if (flag) {
                System.out.println("学号已存在");
            } else {
                break;
            }
        }
        Student stu = setStuInfo(id);
        boolean result=StudentService.addStudent(stu);
        if (result){
            System.out.println("添加成功！");
        }else{
            System.out.println("添加失败！");
        }
    }
//接收输入学生信息
    public Student setStuInfo(String id) {
        System.out.println("请输入学生姓名：");
        String name = sc.next();
        System.out.println("请输入学生年龄：");
        String age=sc.next();
        System.out.println("请输入学生生日：");
        String birthday=sc.next();
        Student stu=new Student();
        stu.setId(id);
        stu.setName(name);
        stu.setAge(age);
        stu.setBirthday(birthday);
        return stu;
    }
    //判断输入学生学号是否存在
    public String getId() {
        String id;
        while (true) {
            System.out.println("请输入学生学号：");
            id = sc.next();
            boolean flag = StudentService.isExists(id);
            if (!flag) {
                System.out.println("该学生不存在");
            } else {
                break;
            }
        }
        return id;
    }

}
